John w



(NoModeL) J. W. HYATT.

Slate Pencil Sharpener.

No. 232,721. Patented Sept. 28,1880...

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' UNITED STATES PATENT Orr-Ice,

JOHN W. HYATT, OF NEWARK, NEW JERSEY, ASSIGNOR TO EMBOSSING COMPANY, OF ALBANY, NEW YORK.

SLATE-PENCIL SHARPENER.

SPECIFICATION forming part of Letters Patent No. 232,721, dated September 28, 1880. Application filed July 12, 1880. (No model.)

To all whom it may concern:

Be it known that I, JOHN W.HYA1"r, of Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Slate-Pencil Sharpeners, of which improvements the following is a specification.

My improvements are designed for use in conjunction with a tumbling or finishing machine such as is patented to me in Letters Patent No. 215,751, dated May 27 1879 5 and the object of the present invention is to provide a means for sharpening or pointing the finished pencils rapidly and with accuracy.

In the accompanying drawings, Figure 1 represents a top or plan view of my improved sharpener, having the hood removed; and Fig. 2, a vertical cross-section on the line w 00 of Fig. 1.

Upon a bed-plate, A, are placed the grinders B B, disks, preferably of iron coated with emery or other grinding material, and having beveled faces, as shown. The angle formed by the beveled faces should be the counterpart of the point to be formed upon the pencil.

The grinders B B are revolved in opposite directions (as indicated by the arrows) by means of the pulleys C C, respectively, and they are mounted in adjustable bearings D D, sliding in ways upon the bed-plate A, so that as the faces are worn away the grinders can On the side toward which the faces of the grinders are beveled is placed thefeeding and holding mechanism. This consists of two uprights, F F, having a portion cut away in the form of an are, which curved cut-away part is faced with rubber, felt, or other yielding and elastic material, as indicated at ff.

Opposite to the uprights are placed the feedwheels G G, consisting of disks having faces, g g, of similar yielding and elastic material, their periphery having a curvature about the same as that of the facings f f upon the uprights.

The feedwheels and uprights are also mounted upon adjustable bearings sliding in grooves KK, respectively,upon the bed-plate,

and when in position for use the point of nearest approximation of the grinders H B is in a line which passes through the center of the open space between the feed-wheel faces and curved faces of the uprights. This open space should be less than the diameter of the pencil, so that the latter shall be held between the elastic faces of the feed-wheels and uprights. A pulley, L, is fitted with a belt, whereby the shaft of the feed-wheels is revolved.

Immediately over the pointing space between the grinders is placed a water-pipe, M, and the grinders are inclosed by a hood or shield, N.

The mode of operation is as follows: The grinders being revolved with great rapidity in the direction of their respective arrows, and the feed-wheels being also revolved at a slower rate in the direction of their arrows, the pencil is laid upon the feed-wheels, one end being inserted over the pointing-space between the grinders. The revolution of the feed-wheels carries the pencil downward, and the resistance of the holders H H causes the pencil to be revolved as its end passes through the grindingspacc, in which, at the same time, the grinding-wheels reduce and sharpen the end. NVhen thus pointed the pencilis carried by the feed-wheels down the holders, and it then drops into a receptacle beneath. During the operation of grindin g, water is fed through the pipe M upon the pencil and grinders.

In the instance shown I have provided two beveled grinding-wheels; but the pointing of the pencil may be effected with one grindingwheel only.

Having thus described the nature and objects of my improvements, I claim as new and desire to secure by Letters Patent- The combination, with the grinder, of the feed-wheels and holders faced with yielding and elastic material, whereby the pencil is turned while the point is reduced, substantially as described.

JOHN W. HYATT. Witnesses:

ABRAHAM MANNERS, J. W. Foam. 

